PT2254是一个电子音量控制 利用 技术特殊设计使用在音频设备上 它DATA/CK/ST有两个内部通道 使它高度地适合单声和立体声应用 通过外部的 引脚输入特别设计的信号 能控制衰减和通道平衡-PT2254 is an electronic volume control using special design techniques used in audio equipment on its DATA/CK/ST has two internal channels to make it highly suitable for application of mono and stereo input through the external pin specially designed to control the attenuation and signal channel balance